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Preparation method of tough, heat-conducting and electricity-conducting graphene film

A graphene film, conductive graphite technology, applied in graphene, nano-carbon and other directions, can solve the problems of expensive preparation equipment, difficult continuous production, long time consumption, etc., and achieve the effect of simple process and high feasibility

Active Publication Date: 2017-11-10
山东金城石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional graphene film preparation methods include chemical vapor deposition (CVD), etc. Although these methods can prepare high-quality intrinsic graphene films, they are still limited due to expensive preparation equipment, high raw material costs, and difficulty in continuous production. not widely used
Although the coating method makes up for some shortcomings of the CVD method, it also makes it difficult to control the consistency of the film structure and increase other problems such as subsequent drying processes.
[0004] With the rapid development of the graphene industry in the past two years, people have gradually paid attention to the method of making thin films of graphene by electrostatic spraying, but this method generally takes a long time, and continuous production is difficult. strict

Method used

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  • Preparation method of tough, heat-conducting and electricity-conducting graphene film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of graphene oxide

[0027] Graphene oxide was synthesized by chemical oxidation method and freeze-dried into graphene oxide powder.

[0028] 2) Preparation of graphene oxide precursor

[0029] The graphene oxide solution prepared in 1) was formulated into an aqueous solution with a concentration of 2 mg / ml.

[0030] 3) Preparation of tough thermally and electrically conductive graphene films

[0031] The high-temperature annular air forming equipment includes a fan 1, a heater 2, a compressor 3, a peristaltic pump 4, an annular air generating head 5, a conveyor 7, and a film collection device 6. The fan 1 is connected to the annular air generating head 5 through a pipeline, and the fan 1 A heater 2 is provided on the official road between the annular air generating head 5, and the annular air generating head 5 is respectively connected with the compressor 3 and the peristaltic pump 4 through pipelines. The device 6 is arranged on a conveyor 7 .

[003...

Embodiment 2

[0035] (1) Preparation of graphene oxide

[0036] Graphene oxide was synthesized by chemical oxidation method and freeze-dried.

[0037] (2) Preparation of graphene oxide precursor

[0038] Weigh 0.1 g of graphene oxide dry powder to prepare a graphene oxide aqueous solution with a concentration of 5 mg / ml.

[0039] (3) Preparation of Tough, Thermally and Conductive Graphene Films

[0040] The precursor solution prepared above is a uniformly dispersed solution. Turn on the peristaltic pump, air compressor, and heater, and pump the precursor solution prepared above into the high-temperature annular air generating head. The outlet temperature of the heater is 500°C and the spraying time is 5s. ; According to the required graphene film thickness, the feed flow of the above operations can be controlled. After the forming is completed, the crawler conveyor will automatically start to start forming the next film.

[0041] One of the prepared films was randomly selected for perfo...

Embodiment 3

[0043] (1) Preparation of graphene oxide

[0044] Graphene oxide was synthesized by chemical oxidation method, freeze-dried, and the infrared spectrum of graphene oxide was as follows figure 1 shown.

[0045] (2) Preparation of graphene oxide precursor

[0046] Weigh 0.1 g of graphene oxide dry powder to prepare a graphene oxide aqueous solution with a concentration of 1 mg / ml.

[0047] (3) Preparation of Tough, Thermally and Conductive Graphene Films

[0048] Such as image 3 As shown, the precursor solution prepared above is a uniformly dispersed solution. Turn on the peristaltic pump, air compressor, and heater, and pump the precursor solution prepared above into the high-temperature annular air generating head. The outlet temperature of the heater is 600°C. The time is 5s; according to the required thickness of the graphene film, the feed flow rate of the above operation can be controlled, and the forming is completed. The crawler conveyor starts automatically to star...

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Abstract

The invention relates to a preparation method of a tough, heat-conducting and electricity-conducting graphene film. A controllable graphene oxide precursor solution is prepared, a graphene sheet in the precursor solution is directly deposited on the inner surface of the wall of a radial glass container by a high-temperature air ring forming device, and a conjugated structure of graphene is repaired to a certain degree by means of the high-temperature process. The finally prepared graphene composite film has quite good toughness and has the characteristics that the minimum thickness can reach 10 plus or minus 2 mu m, the thermal conductivity is 800-q000 W / m.K, the conductivity coefficient is 103-105 S / cm, and bending times reach 104 (R5 / 180 degrees) or more. The method has the advantages of low energy consumption, high efficiency and simple route, and performance of the final film can be controlled through adjustment of process parameters.

Description

technical field [0001] The invention belongs to the field of graphene functional materials, and in particular relates to a preparation method of a tough thermally and electrically conductive graphene film. Background technique [0002] Graphene is a two-dimensional crystalline material with many excellent properties, especially its excellent electrical and thermal conductivity and chemically controllable functionalization properties, making this material widely used in many industrial fields. Unlike other carbon nanomaterials in the past, such as one-dimensional carbon nanotubes and zero-dimensional carbon black, the two-dimensional planar structure of graphene is considered to be more suitable for coating and film applications in terms of dimensions. [0003] Traditional graphene film preparation methods include chemical vapor deposition (CVD), etc. Although these methods can prepare high-quality intrinsic graphene films, they are still limited due to expensive preparation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
Inventor 宋亚滨张敏牟应科李欣胡凯磊张志旭
Owner 山东金城石墨烯科技有限公司